He also is probably practicing "efforts to avoid thoughts or feelings associated with the trauma" as they describe the symptom in the diagnostic
criteria. You are assuming that he doesn't trust you, but it probably doesn't have anything to do with you. He doesn't want to talk about it
because it triggers horrible memories that he can't cope with. You can be there for him without big heart-to-heart conversations.
As far as other symptoms go, he may not even know they are part of PTSD, so he may be thinking he is crazy. Guys usually do.
If you want to familiarize yourself with PTSD symptoms explained in plain English as a normal response to trauma, you can go to http://www.patiencepress.com and read some of the articles there, especially "Home from War" and the first issue of the Post-Traumatic Gazette.
As far as other symptoms go, he may not even know they are part of PTSD, so he may be thinking he is crazy. Guys usually do.
If you want to familiarize yourself with PTSD symptoms explained in plain English as a normal response to trauma, you can go to http://www.patiencepress.com and read some of the articles there, especially "Home from War" and the first issue of the Post-Traumatic Gazette.